Rotary engine



v No. 542,920.

(No Model.)

D. BERRY. ROTARY ENGINE. v

Patented July 16, 1895.

I E V i v WITNESSES. INVENTOB n ya [gig I 4 BY 7 my V I 4 .in whichsimilar lettego .the rotary motion NIT-ED STATES DAVID BERRY, OF FISHROCK, CALIFORNIA.

ROTARY ENGINE.

SPECIFICATION forming part of Letters Patent N 0. 542,920, dated July16, 1895.

Application filed November 12, 1894. Serial No. 528,500. (No model.)

To aZZ whom it may concern.-

Be it known that I, DAVID BERRY, of Fish Rock, county of Mendocino, andState of California, have invented a new and Improved Rotary Engine, ofwhich the following is a full, clear, and exact description.

The object of the invention is to provide a new and improved rotaryengine which is comparatively simple and durable in construction, veryeffective in operation, and arranged to permit of conveniently reversingthe engine whenever desired, and to utilize the motive agent to thefullest advantage.

The invention consists of certain parts and details and combinations ofthe same, as will be fully described hereinafter, and then point;

ed out in the claims. Reference is to be had to the apcornpa-nyingdrawings, forming a part of 7th sspecification, f re fdrence indicatecorresponding parts in all the views.

Figure l is afictional side elevation of the improvement. Fig. 2 is atransverse section of the same on the line 2 2 of Fig. 1. Fig.3 is asectional side elevation of part of the improvement with thereversing-valve in a different position. Fig. 4. is a sectional planview of the reversing-valve on the line 4 4 of Fig. 2, and Fig. 5 is asectional side elevation of a modified form of the abutment and piston.

The improved rotary engine is provided with a cylinder A, in the head ofwhich is mounted the shaft B, carrying atits outer ends a fiy-wheel Band a pulley B for transmitting of the shaft to other machinery. On theshaft B, within the cylinder A, is secured a wheel 0, provided with anumber of pistons D D,fitted to slide radially in the said wheel toengage the sides between the rim of the wheel and the rim of thecylinder A, as is plainly shown in Figs. 1 and 2.

The pistons D D are forcedinto their outermost position by springs E, asindicated in Fig. 1, so thatthe pistons D D in passing over thepermanent abutment A, projecting into the sides between the wheel andcylinder, can slide inwardly, owing to the yielding of the springs E.The abutment A is pro vided with a spring-pressed packing-belt Fengaging the periphery of the wheel 0, so as to form a steam-tight jointbetween the rim of the wheel and the abutment.

From the sides of the abutment A lead the ports a and b to the ports cand d, respectively, formed in the opposite sides of a valve G, mountedto slide transversely in the base of the cylinder A, as is'plainly shownin the drawings. The ports 0 and d are adapted to connect with the portse and f, arranged in the base of the cylinder A and leading from theinlet-pipe H to the exhaust-pipe HQrespectively, of which th efofmer isconnected with a suitable source ofs'team-supply, so that live steamfrom the boiler or other supply can pass through the ports 0 and a intot'h e cyli'iider A on the left-hand side of the "abutment A to press onthe piston D, so as to turn the wheel 0, and consequently the shaft B inthe direction of the arrow at. The steam in front of the other piston Dis forced through the ports I) and d into the exhaustpipe H to the outerair, a condenser, or other device.

In order to reverse the engine, I provide the valve G with the twodiagonally-arranged ports g and h, of which the port 9 is adapted toconnect the port e with the port b, and the other port h is adapted toconnect the port f' with the port a, so that the motive agent enteringthe pipe H can pass through the ports e, g, and b into the cylinder A atthe'right hand of the abutment A to press on the piston D, so as torotate the wheel 0 and shaft B in the inverse direction of the arrow at.The steam in front of the other piston D now passes through the port a,the port h, and port f into the exhaust-pipe H, and from the latter tothe outer air. It is understood that the slide-valve G is shiftedtransversely to connect the said ports 0 d and g h with the ports in thecylinder above described, to cause the engine to runin either direction.

As shown in Fig. 2, one outer end of the valve G is connected with abell-crank lever I, under the control of the engineer, to permit thelatter to shift the valve G transversely to bring either set of portsarranged in the valve into action.

As shown in Fig. 5, the abutment J for the cylinder A is mountedyieldingly in a recess in the cylinder and is pressed on by a spring J,so as to hold the said abutment normally in the path of the piston K,mounted yieldingly on the springs K in the wheel 0 held on thedriving-shaft B. 'lhepiston and abut' ment J and K are preferably madewedgeshaped in cross-section, as illustrated in Fig. 5, so that bothyield when the two surfaces of the abutment and piston come in contactwith each other on the rotation of the Wheel C. The springs J and Kpress the abutment and piston back into their former position as soon asthe two parts have passed each other.

Having thus fully described my invention, I claim as new and desire tosecure by Letters Patent- I 1. In a rotary engine, the combination witha cylinder having an abutment and provided with a port on each side ofthe abutment and with ports in its base, and a wheel mounted in thecylinder and provided with yielding pistons, of a slide valve below theabutment, and provided with ports in its sides and with diagonallyarranged ports in rear of the side ports and extending through the valvein opposite directions, substantially as described.

2. In a rotary engine, the combination with a cylinder having anabutment and provided with the ports a 1) leading from opposite sides ofthe abutment and with the ports efin its base, and a Wheel mounted inthe cylinder and provided with yielding pistons, of the slide valve Gmounted in the base of the cylinder and provided with the ports a d forconnectiug the ports ef with ports a, b, and with the diagonallyarranged ports 9 h extending through the valve, the port 9 adapted toconnect port c with port b, and port It, the portf with port a,substantially as herein shown and described.

DAVID BERRY.

Witnesses:

F. W. SLACK, HENRY BOWEN.

